//
//  LossDistributionPie.swift
//  Graphic Analysis 2
//
//  Created by Kilian Hofmann on 16.06.17.
//  Copyright © 2017 Kilian Hofmann. All rights reserved.
//

import Cocoa

class LossDistributionPie: NSView {
    
    var distribution: [Int] = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]
    
    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        let center: CGPoint = CGPoint(x: 18.5, y: 18.5)
        let startAngle: CGFloat = (1/2) * CGFloat.pi
        let increment: CGFloat = CGFloat.pi / 6
        for i in 0..<12 {
            if NSGraphicsContext.currentContextDrawingToScreen() {
                let layer: CAShapeLayer = CAShapeLayer()
                layer.fillColor = CGColor(red: 1, green: 0, blue: 0, alpha: CGFloat(distribution[i]) / 60)
                layer.strokeColor = NSColor.controlShadowColor.cgColor
                layer.lineWidth = 0.5
                layer.frame = dirtyRect
                let arc: CGMutablePath = CGMutablePath()
                arc.move(to: center)
                arc.addArc(center: center, radius: 18, startAngle: startAngle - CGFloat(i)*increment, endAngle: startAngle - CGFloat(i+1)*increment, clockwise: true)
                arc.closeSubpath()
                layer.path = arc
                if self.layer?.sublayers?.count == 12 {
                    self.layer?.replaceSublayer((self.layer?.sublayers?[i])!, with: layer)
                } else{
                    self.layer?.addSublayer(layer)
                }
            } else {
                let arc: CGMutablePath = CGMutablePath()
                arc.move(to: center)
                arc.addArc(center: center, radius: 18, startAngle: startAngle - CGFloat(i)*increment, endAngle: startAngle - CGFloat(i+1)*increment, clockwise: true)
                arc.closeSubpath()
                NSGraphicsContext.current!.cgContext.addPath(arc)
                NSGraphicsContext.current!.cgContext.setFillColor(CGColor(red: 1, green: 0, blue: 0, alpha: CGFloat(distribution[i]) / 60))
                NSGraphicsContext.current!.cgContext.setStrokeColor(NSColor.controlShadowColor.cgColor)
                NSGraphicsContext.current!.cgContext.drawPath(using: CGPathDrawingMode.fillStroke)
            }
        }
    }
}